Custom Renovate Manager for Terraform (#600)

* Include custom manager for Terraform GitHub workflow

* Refactor Renovate configuration and workflows

Refactored the Renovate configuration and workflows to improve the system's overall efficiency and maintainability. Made the following changes:
- Replaced custom managers with regex managers in ".github/renovate.json"
- Modified the match strings in the regex manager to target specific files and extract version information
- Updated the dependencies and added the necessary environment variables in ".github/workflows/renovate.yml"
- Removed explicit names of actions in the workflow steps and simplified the checkout and token generation steps

.github/renovate.json

@@ -1,10 +1,9 @@
 {
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
-  "customManagers": [
+  "regexManagers": [
     {
       "datasourceTemplate": "github-releases",
       "depNameTemplate": "hashicorp/terraform",
-      "extractVersionTemplate": "v(?<version>.*)",
       "fileMatch": "^\\.github/workflows/.*\\.yaml",
       "matchStrings": ["terraform_version: (?<currentValue>.*)"]
     }

.github/workflows/renovate.yml

@@ -26,18 +26,15 @@ jobs:
 #     - name: Permissions Monitor
 #       uses: GitHubSecurityLab/actions-permissions/monitor@v1
 
-      - name: Checkout
-        uses: actions/[email protected]
+      - uses: actions/[email protected]
 
-      - name: Generate Token
-        id: generate_token
+      - id: generate_token
         uses: tibdex/github-app-token@v2
         with:
           private_key: ${{ secrets.PRIVATE_KEY }}
           app_id: ${{ secrets.APP_ID }}
 
-      - name: Self-hosted Renovate
-        uses: renovatebot/[email protected]
+      - uses: renovatebot/[email protected]
         env:
           LOG_LEVEL: ${{ inputs.logLevel || 'INFO' }}
         with: